Chuck.



PATENTED MAR. 19, 1907. B.M. W. HANSON.

0H UCK. APPLIGATION FILED MAY 22, 1905.

2 SHEETS-SHEET 1.

\m\ Y A M. m Q

N Rw B. M. W. HANSON. CHUCK.

APPLICATION FILED MAY 22, 1905.

2 SHEETS-SHEET 2.

' UNITEDl STATES PATEN OFFICE. y"

BENCT M. W. HANsON, OF HARTFORD, CONNECTICUT, AssIGNoR To PRATT a WHITNEY COMPANY, or HARTFORD,A CONNECTICUT, A CORPORATION or NEW JERSEY.

To all whom it may ooh/ cerni- Re .a known that I, BENGT M. W. 'I-IANSN,

provision vin a .chuck having a. chambered ody of peculiar devices for actuating the jaws thereof, said devices including a ring 1ocated in the chamber and bearing against said jaws, toggle levers or struts' in engage' ,ment with the ring, and means for actuating said toggle levers or struts to cause the ring to close said jaws. v A further obj ect ofthe invention is the provision of a chuck-body of peculiar internalA constructlori and of jaws and a jaw-actuator within the body, as will be hereinafter described.

In the accom anying drawings, Figure 1 is an end view o a chuck constructed in accordance with one form of the invention, and Fig. 2 is a longitudinal vertical section of said chuck. l Fig. 3 isan end view of another form of chuck, and Fig. '4 is alongitudinal vvertical section of said chuck.

Like numerals' designate' similar parts throughout the several views.

Referring to .the drawings, the numeral 1 designates a chuck body-or head internally threaded at 2 to engage an external thread 3 on'a spindle 4 and rabbeted at 5 to receive a circumferential stop-ange 6, of said spindle.'

In the chuck-body 1 are Inclined ,slots 7 and in the end of said body are recesses 8 for. the reception of a s anner by means ofV which ev attached to or removed from the spin 4. Forward lof vits median line the chuck-body is reinforced or thickened at 9, and the inner circumferential wall of this reinforced ortion is inclined at its at 10 for a purpose hereinafter stated.

I Specification of Letters Patent. Appunti@ ma may 22.1965.. serial No. 261.669.

A further object of the invention is thev -body is a collar 16, havi s Patented Maren 1e, 1907.

having heads 11', provided withright-angular bearing-surfaces 112. `At their-lower ends eachitogle lever or strut is provided with a rounde or/convex surface 113, whichiit in a concave groove 1 2 of a `)aw-actuating ring 12 y said ring having acircumferential flange,

122 and being of substantiall Z shape In cross-section to afford a flat caring on its periphery to engagea cylindrical surface 13 onthe inner side ofthe chuck-body. Independent chuck-jaws 14 are shown Fig. 2, and each is provided with `a downward incline 14 at itsforward end, coperat-l ing with the incline 10 of the chuck-bodyfand Designated each by 'the numeral 11 are wedge-shaped toggle levers or struts, each with. an incline 142, coperating withthein- -clinelO of said chuck-body. At their inner extremities each chuck-jaw ist provided with a circumferential flange 15 1n engagement with the\shou1der or flange 122 of the ring 12.

Threaded on the Outer end ofthe chuckanner-recesses 16', said collar beingy provi e with an incline 162, which lengages an incline 17 of a sliding sleeve 17, surrounding the chuck-body sai sleeve having a strai ht inner surface 7,219.1;

its forward end co orming to the straight part ofthe periphery of thel collar 16. v In the o eration of thIs form of the invention when t e sleeve 17 is slid forward the incline' 17"v thereof will engage the inclined ends of the` ytoggle levers or struts and will tend.l to

drical surface 13 to therear, and the Bange 122 of said ring in engagement with the anges 15 of the chuck-jaws will pull said jaws Within the chuck-body and cause them to engalge the inclines on the inner wall thereof and e vforcibly compressed upon the stock. A re-l verse movement of the sleeve 17 will release the parts and permit the chuck to open.V Byy reinforcing the inner wall of the chuck-body at the point described strength is provided where most needed to resist the strain.

In the form of the invention shown in Figs.

ICO

3 and 4 a chuck body or head 18, having a flange 18', slots 19 adjacent toits rear end,

and holes 20 in its front end for the reception of a Spanner, is represented.. Like the other form this body is reinforced atv2'l to resist strain, and the reinforced part has inclines 22 and 23'; but these inclines are reversely* located with res ect to th: se shown' in Fig. 2, so that the chuc i-j aws 24, having inc'ines 24 and 242, are clssed by forcing them forward into the chuck-body instead of 4pulling them therein, is in the other construction. Toggles 25, like the toggles 11, are seated at one llo jAnsiding sleeve 27, inc inedon it's. inner side at 27 and straight at272to engage aringl28,v

end ina groove 26 of a ring 26, bearing againstthe inner ends of the jaws 24 and confined by -a cylindrical su-rface262 ofthe head.

threaded to the rear end of the chuck-body,

actuates the' toggles, and theacticn of thisform of chuck is the -reverse of that of] the other -form-a afin/the chuck illustrated v in Figs. 1` and 2 the jaws are pulled rearward into the chuck-body,'while inFigs. 3 and 4 the are forced In prior constructions lknown to me the .chuck has `been operated byfa long sleeve inserted in the bore of the spindle, by which said chuck is carried. 'I'his sleeve takes up l considerable valuable space, and therefore limits the' capacity of the spindle to receive` stock of a diameter approximating the bore thereof. .Inboth forms of the invention shown I have obviated this difiiculty bv the provision z within the chamber of achuck-body of a comparatively narrow ring adapted -to engage the chuck-jaws and to force them when actuated byl the means described or other means upon the stock. By the provision of this ring in either of the forms shown, said ring having a bore of sufficient diameter to receive stock c f the-sizes to enter the tubular s indle, defects of the old construction are eiiminated, and the action ofthe toggles against the ring 'serves t'o close the chuckjaws firmly uponthe material to beheld by cient to receive stock passing through 4the spindle, means for actuating said ring; and means for closing thech'uck-jaws when the ring is actuated.

2.` A chuck comprising a slotted, tubularl head having inclined and cylindrical surfaces on its inner wall, toggles mounted in the slots of the head, a sleeve movable on theI head,.and serving to actuate said.toggles, a

forward intosaid 'chuckring 'loose within the head, and engaged by the'inner ends of the toggles, said ring being guidedby the cylindrical part of the inner wall of the'head, and chuck-jaws 1having inclines in engagement with the inclined art of said inner wall of the head, the rear en s of said chuck-jaws bearing against said ring.

The combination, wlth a s indle, of a tubular `head having periphera slots, and provided with inclined and cylindrical inner surfaces; chuck-jaws in said head; to glevlevers passing through said peripheral s ots,

and having inclined surfaces; a ring loose within the head beyond the spindle, said ring fitting the cylindrical .inner surface of the head, andA enga ing the rear ends of the4 chuck-jaws, and eing actuated'by said toggle-levers and a sleeve movable on the head, and having an inclined surface for operating the toggle-levers.

4. IThe combination, with. a s indle, of a tubular-'head in engagement wit the end of said spindle,.said head; havin a series of slots a grooved lring lose wit 'n the head beyond the end of the spindle; chuck-jaws bearin at their rear ends against said ring;

toggleevers extending through said slots, andvseyat'ed at one end in the groove ofthe ring; an adjustable abutment for theheads of the toggle-levers and means for actuating said toggle-levers, and thereby moving the ring. 1

5. The combination, with a s indle, of a tubular head having a series of s ots and an inclined inner surface; toggles mounted in the'slots, and having inclined outer ends; a grooved ring loosely mounted in the head, and with which the inner and rear ends of said toggles are in engagement a sleeve slidable on the head, said s eeve having inclined 'and cylindrical innerfsurfaces engaging the toggles; and chuck-jaws in position within the headto be engaged at their rear ends by said ring.

' 6. The combination, with av tubular head having a series of inclined slots, and also havlng an inclined inner surface, of toggle-levers locatedlnsaidslots, and having angular up- IOO per and rounded lower extremities; amovi able ring. located in the head, and having a groove inwhich the lower extremities of said toggle-levers are seated; a sleeve slidable on the chuck-body, and having an inclined surface for actuating the toggle-levers', an abutment for the heads of said toggle-levers and chuck-(jaws 'bearing/at. their rear ends directly against said ring.

7. A lchuck comprising a tubular and slot led head, said head having Jinclined and Acyli drical surfaces on its inner wall; toggles mounted'in the head; a ring fittingl the cylindrical inner surface of the head, and with which the rear and inner ends of said toggles are engagement; chuck-jaws within the vIn testimony whereof I afHX my signature head havlng inclindbperiplleries, aldtin plfljin presence of two Witnesses. sition to e en a e sai rin an t e inner surface (i t e hgad; and sleeveyslid- BENGT W HANSON' 5 ableon the head, said sleeve having an inner Witnesses:

surface shaped to lengage and amate the 1 i KATE. T. M. OYCONNELL,` toggles. HENRY L. HUNTINGTON. 

